ThermochemistryMedium
Question
Which of the following diagrams gives an accurate representation of the given reaction?
$C(s) + 2H_{2}(\text{ }g) \rightarrow {CH}_{4}(\text{ }g);\Delta H = - 74.8\text{ }kJ{\text{ }mol}^{- 1}$.
[ $R \rightarrow$ reactants; $P \rightarrow$ products]
Options
A.
B.
C.
D.
Solution
Sol. [Key Concept: Energy-profile diagram of an exothermic reaction (ΔH = −74.8 kJ mol⁻¹)] $\Delta H = - 74.8kJ{mol}^{- 1}$, it is an exothermic reaction.
So, accurate representation is
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